I agree with your comment. A lot of people have rather strange notions as to what IP spoofing is, and what it can do. Session hijacking is another concept that people rarely understand.

The actaul art of spoofing is more like hijacking, also you never get replies, since the destination ip and your ip are down two completly different paths. Making it rather useless unless your farming a massive ddos, smurfing or some other script kiddie crime.

Programs like privoxy and tor, combined with firefox and foxyproxy make a easy way to “onion” your connection. At least fooling the adverts and clickstream trackers. Although if you do something “questionable” someone motivated enoungh could eventaully find you.

The only true anonymous surfing is to go hijack your poor nieghbors unecrypted wi-fi connection.